Concrete-mixer.



P. F. REIMANN CONCRETE MIXER.

APPLICATION FILED MAR. 16 1917.

1,254,935. Patented Jan. 29,1918.

S PATENT CONCRETE-MIXER.

1 I "fi t r Specification of Letters Patent.

Patented J an. 29, 1918.

Application filed March 16, 1917. Serial No. 155,161.

T 0 all whom it may concern.

Be it known that I, PAUL F. REIMANN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Concrete-Mixers, of which the following is a specification.

My invention relates to concrete mixers and has for its primary object the provision of an improved mixer which shall have improved means fortru-ndling a drum while turning the drum over, as well as for trundling the drum while it is stationary with respect to its axis.

A further object is the provision of means 7 tion and partly broken away to disclose interior mechanism, and also illustrating in dotted lines the position of parts assumed when the drum is trundled along the ground while stationary with respect to its axis;

Fig. 2 is a section approximately on line 22 of Fig. 1;

Fig. 3 is a section taken on line 33of Fig. 2 illustrating the looseness of the drum axle in its bearing;

Fig. l is a section taken on line H of Fig. 3;

Fig. 5 is a section taken on line 55 of Fig. 1.

Reference numeral 10 indicates generally a substantially cylindrical concrete mixing drum with conical ends 11 which are centrally apertured as at 12 for charging and discharging the mixer. At each end the drum is spanned by a spider 13 provided with a bearing 1A concentric with the drum, the spider being preferably riveted to the conical end 11. An axle 15 is mounted in the bearings 11, the axle being considerably smaller than the hearings in order to provide play of the axle relatively to the drum 10.

is rigidly secured and a roller 18 is journaled upon the free end of the radially extending bracket 17 and bears against the inner periphery of the drum 10; the bracket 17 projects forwardly of the axle 15, preferably diametrically opposite to the handle 16 and, as will be seen in Fig. 1, causes propelling power from the handle 16 to be com: municated to the inner wall of the drum at a point above and forward the point of engagement between the drum and the ground. The handle 16 is provided with extensions 19 which project forwardly of the axle and embrace the drum preferably lying diametrically opposite the handle 16 and being integral therewith. A wheel 21 is journaled in the forward ends of the extensions 19, the roller 18 and the wheel 21, being preferably alined with the longitudinal center of the axle 15. To prevent side play of the axle 15 with respect to the drum a boss 22 is formed on the inner surface of each endof handle 16 engaging the outer surfaces of the respec tive spiders 13. i

As seen in Figs. 1, 2 and 5 a chute 23 is hinged to the edge'of the aperture 12 at each end of the drum, the chute hearing at its inner upper edges ears 24: which engage adjacent legs of spider 13 to limit outward swing- 111g movement of the chute. To prevent the chute from swinging outwardly while the concrete is being mixed a latch 25 is pivoted as at 26 to one leg of spider 13 and, as shown in Fig. 1, overlies the outer surface of the chute 23. As illustrated best in Fig. 5 the chute is swung outwardly to provide a convenient receiving element for sand, stone and cement with which the mixer is charged.

In the operation of my invention the chute 23 is swung outwardly and receives the ingredients from which the mixed concrete is made, following which the chute is swung inwardly into the position illustrated in Fig. 2 wherein it lies substantially flush with the edges of aperture 12 at each end of the drum, latch 25 being swung into the position of Fig. 1 to maintain the chute in the inner position. The operator now grasps handle 16, lowering the handle sufficiently to raise wheel 21 from the ground,

following which he pushes upon the handle,

the thrust being communicated from the handle through axle 15, bracket 17 and roller 18 to the inner periphery of the drum 10 at a point preferably slightly more than 45 degrees forwardly of the lower vertical radius of the drum. Normally the mixing of the concrete is accomplished by propelling the drum toward the left, as viewed in Fig. 1, this movement resulting in confining the tumbling ingredients to the rear or righthand portion of the drum, as viewed in Fig. l, leaving wheel 18 clear of stone and gravel and giving it a substantially free path of travel on the inner periphery of the drum When the concrete has been suiiiciently mixed it may happen that the drum is not properly located with respect to the desired place of discharge. Should this occur the operator elevates handle 16 into the dotted line position shown in Fig. 1, thereby lowering wheel 21 into contact with the ground and elevating the whole drum from the ground. A wheelbarrow action is thus secured and the drum is conveyed to the desired place of discharge without its further rotation with respect to its axis. The drum may now be turned upon either end, and latch 25 withdrawn; this will cause the chute 23 to drop and permit the mixed concrete to pour from the conical end 11 out through chute 23. If desired chute 23 need not be employed in the discharging function as the material mixed may be dumped from any point about the circum ference of aperture 12. It will be noted that the play provided between axle 15 and the bearings 14 in spider 13 provides that the power for revolving the drum shall always be applied to the inner wall of the drum unless it should be the desire of the operator to pull the drum backwardly or to the right, as viewed in Fig. 1. This latter direction of movement, however, would normally not occur inasmuch the ingredients being mixed would be apt to jam between wheel 18 and the drum;

While I have illustrated and described the preferred embodiment of my invention it will be obvious that one skilled in the art might make modifications thereof without departing from the spirit of the invention. I wish therefore not to be confined to the precise embodiment shown except in so far as the same is limited in the appended claims.

I claim:

1. In a concrete mixer the combination with a substantially cylindrical drum, of an outside propellinghandle for the same, a roller bearing against the inner periphery of the drum, and a bracket in which said roller is ournaled and which is rigidly fixed with relation to the handle.

2. In a concrete mixer the combination with a substantially cylindrical drum, of central end bearings on the same, an axle mounted in the bearings, an outside propelling handlefor the drum rigidly secured to the axle, a roller bearing against the inner periphery of the drum, and a bracket in which said roller is journaled and which is rigidly fixed to the axle. I

3. In a concrete mixer the combination with a substantially cylindrical. drum, of an axle concentrically and loosely mounted therein, an outside propelling handle embracing the drum, rigidly ecured to opposite ends of the axle and extending rearwardly thereof, a bracket within the drum, rigidly secured to the axle and extending forwardly thereof, a roller journaled in the bracket and bearing against the inner periphery of the drum, extensions on the handles protruding forwardly of the axle, and

anti-friction means carried on the forward ends of the extensions.

4i. In a concrete mixer the combination with a substantially cylindrical drum, of an axle concentrically and loosely mounted therein, an outside propelling handle embracing the drum, rigidly secured to oppo site ends of the axle and extending rearwardly thereof, a bracket within the drum, rigidly secured to the axle and extending forwardly thereof, a rollerjournaled in the bracket and bearing against the inner periphery of the drum, extensions on the handles protruding forwardly of the axle, and a single wheel carried on the forward ends of said extensions, said roller and wheel being substantially opposite the longitudinal center of the drum.

In testimony whereof I have affixed my Copies of this patent may be obtained. for five cents each, by addressing the Commissioner of Patents,

' 'Washingtori, D. C. 

